<template>
  <div class="permission-container">
    <div class="app-container">
      <!-- 表格 -->
      <el-card>
        <div style="text-align: right; margin-bottom: 20px">
          <el-button type="primary" size="small" @click="hAdd(1,0)">添加权限</el-button>
        </div>
        <el-table
          border
          :data="list"
          row-key="id"
        >
          <el-table-column label="名称" prop="name" />
          <el-table-column label="标识" prop="code" />
          <el-table-column label="描述" prop="description" />
          <el-table-column label="操作">
            <template slot-scope="{row}">
              <!-- 按业务要求，只有是页面级别的节点(type=1)，才有添加 -->
              <el-button v-if="row.type===1" type="text" @click="hAdd(2, row.id)">添加</el-button>
              <el-button type="text" @click="hEdit(row.id)">编辑</el-button>
              <el-button type="text" @click="hDel(row.id)">删除</el-button>
            </template>
          </el-table-column>
        </el-table>
      </el-card>
    </div>

    <el-dialog
      :close-on-click-modal="false"
      :close-on-press-escape="false"
      :visible.sync="showDialog"
      :title="isEdit? '编辑权限点' : '添加权限点'"
      @close="resetForm"
    >
      <!-- 表单内容 -->
      <el-form
        ref="form"
        :rules="rules"
        :model="formData"
        label-width="100px"
      >
        <el-form-item label="权限名称" prop="name">
          <el-input v-model.trim="formData.name" />
        </el-form-item>
        <el-form-item label="权限标识" prop="code">
          <el-input v-model.trim="formData.code" />
        </el-form-item>
        <el-form-item label="权限描述" prop="description">
          <el-input v-model="formData.description" />
        </el-form-item>
        <el-form-item label="权限启用">
          <el-switch
            v-model="formData.enVisible"
            active-text="启用"
            active-value="1"
            inactive-text="不启用"
            inactive-value="0"
          />
        </el-form-item>
      </el-form>

      <template #footer>
        <div style="text-align: right;">
          <el-button @click="showDialog = false">取消</el-button>
          <el-button type="primary" @click="hSubmit">确定</el-button>
        </div>
      </template>
    </el-dialog>
  </div>
</template>
<script>
import { getPermissionList, addPermission, delPermission, getPermissionDetail, updatePermission } from '@/api/permission.js'
import { tranListToTreeData } from '@/utils'
export default {
  data() {
    const validCode = (rule, value, callback) => {
      // 添加时，不能与现有的重复
      let existCodeList = this.originList
      // 编辑时，code可以取自己的， existCodeList中要排除当前项
      if (this.isEdit) {
        existCodeList = this.originList.filter(item => item.id !== this.formData.id)
      }

      existCodeList.map(item => item.code).includes(value)
        ? callback(new Error(value + ' 已经占用'))
        : callback()
    }

    const validName = (rule, value, callback) => {
      // 添加时，同级不重复
      // eslint-disable-next-line eqeqeq
      let existNameList = this.originList.filter(item => item.pid == this.formData.pid)
      // 编辑时，name可以取自己的， existNameList中要排除当前项
      if (this.isEdit) {
        // eslint-disable-next-line eqeqeq
        existNameList = this.originList.filter(item => item.id !== this.formData.id && item.pid == this.formData.pid)
      }

      existNameList.map(item => item.name).includes(value)
        ? callback(new Error(value + ' 已经占用'))
        : callback()
    }
    return {
      list: [],
      originList: [], // 为了方便校验，而准备的数据
      showDialog: false,
      isEdit: false,
      formData: {
        name: '', // 名称
        code: '', // 权限标识
        description: '', // 描述
        enVisible: '0', // 开启
        pid: '', // 添加到哪个节点下
        type: '' // 类型
      },
      rules: {
        name: [{ required: true, message: '名称不能为空', trigger: 'blur' },
          { validator: validName, trigger: 'blur' }
        ], // 名称
        code: [
          { required: true, message: '权限标识不能为空', trigger: 'blur' },
          { validator: validCode, trigger: 'blur' }
        ], // 权限标识
        description: [{ required: true, message: '描述不能为空', trigger: 'blur' }] // 描述
      }
    }
  },
  created() {
    this.loadPermissionList()
  },
  methods: {
    hAdd(type, pid) {
      this.showDialog = true
      this.isEdit = false

      this.formData.type = type
      this.formData.pid = pid
    },
    async doAdd() {
      try {
        const res = await addPermission(this.formData)
        console.log('addPerimission', res)
        // 1. 关闭弹层 导致弹层关闭 ---> @close
        this.showDialog = false
        // 2. 重新请求数据
        this.loadPermissionList()
      } catch (err) {
        console.log('addPerimission', err)
      }
    },
    async doDel(id) {
      try {
        const res = await delPermission(id)
        console.log('delPermission', res)

        // 1. 重新请求数据
        this.loadPermissionList()
        // 2. 提示
        this.$message.success('删除成功')
        // 保存数据
      } catch (err) {
        console.log('delPermission', err)
      }
    },
    // 用户删除
    hDel(id) {
      this.$confirm('你确定要删除吗').then(() => {
        this.doDel(id)
      }).catch(() => {})
    },
    async doEdit() {
      try {
        const res = await updatePermission(this.formData)
        console.log('updatePermission', res)
        // 1. 关闭弹层 导致弹层关闭 ---> @close
        this.showDialog = false
        // 2. 重新请求数据
        this.loadPermissionList()
      } catch (err) {
        console.log('updatePermission', err)
      }
    },
    async hEdit(id) {
      this.isEdit = true
      // 获取详情数据
      try {
        const res = await getPermissionDetail(id)
        console.log('getPermissionDetail', res)
        this.formData = res.data // 赋值之后，表单就有数据回填

        // 显示弹层
        this.showDialog = true
      } catch (err) {
        console.log('getPermissionDetail', err)
      }
    },
    hSubmit() {
      this.$refs.form.validate(valid => {
        if (!valid) return

        this.isEdit ? this.doEdit() : this.doAdd()
        // if (valid) {
        //   this.isEdit ? this.doEdit() : this.doAdd()
        // }
      })
    },
    resetForm() {
      // 表单数据清空
      this.formData = {
        name: '', // 名称
        code: '', // 权限标识
        description: '', // 描述
        enVisible: '0', // 开启
        pid: '', // 添加到哪个节点下
        type: '' // 类型
      }

      this.$refs.form.resetFields()
    },
    async loadPermissionList() {
      try {
        const res = await getPermissionList()
        this.originList = res.data.map(({ id, pid, name, code }) => ({ id, pid, name: name.trim(), code }))
        const list = tranListToTreeData(res.data)

        console.log('getPermissionList', list)
        // 保存数据
        this.list = list
      } catch (err) {
        console.log('getPermissionList', err)
      }
    }
  }
}
</script>
